Talks over a new six-year contract broke down Thursday. Union members plan to meet today to discuss their options.

“It’s been our concern all along that (Waste Management) is planning to lock out our drivers,” said Paul Zilly, a spokesman for the local. “If there’s a lockout, it could happen at any time.”

Waste Management is hopeful the sides will come to an agreement, but has backup plans if they do not, spokeswoman Robin Freedman said.

“Our commitment is to the customers we serve and we will provide service to the best of our ability if there are any sort of disruptions by the union,” Freedman said. “We really hope that the union leadership gives the union members a chance to vote on this contract.”

The Houston-based company’s local office posts regular service updates at www.wmnorthwest.com. The site listed no service delays as of Friday.

About 20 of the 152 affected drivers are Snohomish County-based, working out of yards in Marysville and Bothell, Zilly said.

Waste Management said its final offer to the drivers included an average wage and benefit increase of more than 4 percent per year. That would give the average recycling driver more than $98,000 in compensation in the final year of the new contract, according to the company. Each employee would receive a $2,000 signing bonus if the contract is accepted by Sunday.